The formation of ${}_{90}^{230}$Th from ${}_{92}^{234}$U occurs by:
A.
electron capture
B.
α decay
C.
β decay
D.
positron decay
Exam No：AP Chemistry Problem Set 4 Year：2024 Question No：APChemistry2024AP0158
Answer:
B
Knowledge points:
1.5 Atomic Structure and Electron Configuration
Solution:
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